CN103165954A - Battery cooling structure - Google Patents
Battery cooling structure Download PDFInfo
- Publication number
- CN103165954A CN103165954A CN2012103908137A CN201210390813A CN103165954A CN 103165954 A CN103165954 A CN 103165954A CN 2012103908137 A CN2012103908137 A CN 2012103908137A CN 201210390813 A CN201210390813 A CN 201210390813A CN 103165954 A CN103165954 A CN 103165954A
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- CN
- China
- Prior art keywords
- heat transfer
- transfer sheet
- battery module
- cooling
- coldplate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6554—Rods or plates
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
- H01M50/264—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks for cells or batteries, e.g. straps, tie rods or peripheral frames
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
A battery cooling structure includes a cooling plate and a heat transfer sheet. The cooling plate is to cool a battery module including a plurality of battery cells arranged side by side. The heat transfer sheet is provided between the cooling plate and a cooling surface of the battery module to transfer heat from the cooling surface to the cooling plate. The heat transfer sheet is deformable by a pressure applied to the heat transfer sheet. The heat transfer sheet includes a positioning hole through which the cooling surface of the battery module is visible when the heat transfer sheet is assembled to the battery module.
Description
Technical field
The present invention relates to a kind of cooling construction of storage battery, clip the heat transfer sheet that pressure can be utilized and be out of shape between the cooling surface of the battery module of stacked a plurality of secondary battery units and coldplate, through described heat transfer sheet, the heat of described battery module is delivered to described coldplate from described cooling surface, thereby carries out cooling.
Background technology
Cooling surface at the coldplate upper support battery module of the hollow of internal circulation cold-producing medium, the heat of battery module is passed to coldplate from cooling surface to carry out cooling, in the case, owing to can not avoiding being all to produce small space between the cooling surface of battery module of rigid body and coldplate, so thereby have the problem that hinders the cooling performance of the heat conduction battery module between cooling surface and coldplate to descend by this space.
In order to address this problem, by the known a kind of technology of following patent documentation 1, it clips the good heat transfer sheet that can be out of shape of heat conductivity between the cooling surface of battery module and coldplate, distortion by heat transfer sheet disappears the cooling surface of battery module and the space between coldplate, the heat transmission of promotion from cooling surface to coldplate, thereby the cooling performance of raising battery module.
(prior art document)
(patent documentation)
Patent documentation 1: TOHKEMY 2011-34775 communique
But, have simultaneously the heat transfer sheet of superior heat conductivity and deformability owing to for example being formed by the such material of silicone rubber, so exist its surface to have the situation of cementability.Consequently, when for when clipping heat transfer sheet between the cooling surface of battery module and coldplate and on cooling surface, heat transfer sheet being positioned, heat transfer sheet with cementability pastes the errors present of cooling surface, in order to revise it, heat transfer sheet is out of shape or is damaged, thereby has the problem of the operability decline of work.
Summary of the invention
The present invention proposes in view of described situation, and purpose is to provide a kind of heat transfer sheet that easily carries out with respect to the technology of the location of the cooling surface of battery module.
To achieve these goals, invention described according to technical scheme 1, a kind of cooling construction of storage battery is proposed, its heat transfer sheet that clamping can be out of shape under pressure between the cooling surface of the battery module of stacked a plurality of secondary battery units and coldplate, through described heat transfer sheet, the heat of described battery module is passed to described coldplate from described cooling surface, thereby carry out coolingly, it is characterized in that
Described heat transfer sheet has the location hole of cooling surface that can visual described battery module.
In addition, invention described according to technical scheme 2, the cooling construction of a kind of storage battery of proposition, it is characterized in that, except the formation of technical scheme 1, described battery module has the support that is clipped in the middle by described a plurality of secondary battery units, and described support is relative with described location hole.
In addition, invention described according to technical scheme 3, the cooling construction of a kind of storage battery of proposition is characterized in that except the formation of technical scheme 1 or technical scheme 2, the number of described location hole is a plurality of.
In addition, invention described according to technical scheme 4, the cooling construction of a kind of storage battery of proposition is characterized in that, any one consists of in technical scheme 1～technical scheme 3, described battery module have surround described cooling surface around and to the side-prominent prominent wall section of described coldplate.
In addition, invention described according to technical scheme 5, a kind of cooling construction of storage battery is proposed, it is characterized in that, any one consists of in technical scheme 1～technical scheme 4, described support has the location division narrower than the width of described location hole, is provided with a plurality of described location holes along described location division.
And the intermediate support 15 of execution mode is corresponding to support of the present invention, and the lower flange 15c of execution mode is corresponding to location division of the present invention.
(invention effect)
Formation according to technical scheme 1, when at coldplate upper support battery module, the heat transfer sheet that can be out of shape under pressure due to clamping between the cooling surface of battery module and coldplate, so that heat transfer sheet distortion and prevent from producing the space between the cooling surface of battery module and coldplate, thereby can the heat of battery module be passed to from cooling surface the cooling effect that coldplate improves battery module effectively through heat transfer sheet.When the cooling surface with respect to battery module positions heat transfer sheet, if exist mistake its locate heat transfer sheet with respect to the problem of the position deviation of cooling surface, but, because the operator can come the cooling surface of visual battery module by the location hole that is arranged on heat transfer sheet, so can be easily and correctly carry out the operation that the cooling surface with respect to battery module positions heat transfer sheet.
In addition, formation according to technical scheme 2, battery module has the support that is sandwiched between a plurality of secondary battery units, because this support is relative with the location hole of heat transfer sheet, so not only the decline that the caused heat conductivity of location hole is set can be suppressed to Min. on heat transfer sheet, the operator also can improve the precision of location by the location hole of confirmation heat transfer sheet and the position relationship of support.
In addition, according to the formation of technical scheme 3, owing to being provided with a plurality of location holes on heat transfer sheet, so can further improve heat transfer sheet with respect to the positioning accuracy of the cooling surface of battery module.
In addition, formation according to technical scheme 4, due to battery module have surround cooling surface around and to the side-prominent prominent wall section of coldplate, even so the heat transfer sheet that clips between cooling surface and coldplate distortion and expansion laterally, can prevent not only that also heat transfer sheet from exposing laterally from cooling surface, thereby be out of shape to the inside by the quilt heat transfer sheet that wall section blocks of dashing forward the aperture area that dwindles location hole, the decline that the caused heat conductivity of location hole is set can also be suppressed to Min..
In addition, according to the formation of technical scheme 5, support has the location division narrower than the width of location hole, owing to being provided with a plurality of location holes along the location division, thus can see through from a plurality of location holes whole location holes of support, thus positioning accuracy further improved.
Description of drawings
Fig. 1 is the stereogram (the first execution mode) of battery module;
Fig. 2 is the exploded perspective view (the first execution mode) of battery module;
Fig. 3 is the stereogram (the first execution mode) of the battery module that turns upside down;
Fig. 4 is 4 enlarged drawings (the first execution mode) of Fig. 3;
Fig. 5 is the 5-5 line profile (the first execution mode) of Fig. 4
Fig. 6 is the 6-6 line profile (the first execution mode) of Fig. 4;
Fig. 7 means the figure (the first execution mode) of the shape of heat transfer sheet;
Fig. 8 is that 8 directions of Fig. 2 are to view (the first execution mode)
Fig. 9 is the Action Specification figure (the first execution mode) corresponding to Fig. 5;
Figure 10 is the Action Specification figure (the first execution mode) corresponding to Fig. 6;
Figure 11 means other the figure (the second～the 4th execution mode) of execution mode of location hole.
In figure
The 12-coldplate;
The 13-battery module;
The 14-secondary battery unit;
The 14a-cooling surface;
15-intermediate support (support);
15c-lower flange (location division);
The prominent wall of 15d-section;
The prominent wall of 16c-section;
The 21-heat transfer sheet;
The 21a-location hole.
Embodiment
Below, based on Fig. 1～Figure 11, embodiments of the present invention are described.
The batteries 11 of carrying on electric automobile as Fig. 1 and as shown in Figure 2, is constituted as at coldplate 12 a plurality of battery modules 13 of upper support ..., represented a part and 2 battery modules 13,13 of coldplate 12 in Fig. 1 and Fig. 2.In the present embodiment, 2 battery modules 13,13 are by integrated, but the structure of each battery module 13 is identical in fact.
As Fig. 3～shown in Figure 6, the intermediate support 15 that the horizontal cross-section forms H word shape has: the tabular rack body 15a of section, and it is by adjacent 2 secondary battery units 14,14 clampings; A pair of lateral flanges 15b, 15b, they are side-prominent to stacked direction two from the edge, the left and right sides of the rack body 15a of section; And lower flange 15c, its lower limb from the rack body 15a of section is side-prominent to stacked direction two.Adjacent intermediate support 15 ... lateral flanges 15b ... be engaged with each other, thus these intermediate supports 15 ... mutual position relationship be limited, consequently, limited a plurality of secondary battery units 14 ... mutual position relationship.The width of lower flange 15c is less than the width of lateral flanges 15b, 15b, even at adjacent intermediate support 15 ... lateral flanges 15b ... under the state that is engaged with each other, lower flange 15c ... do not mesh each other secondary battery unit 14 yet ... lower surface (cooling surface 14a described later) expose between them.
The end frame 16 that the horizontal cross-section forms " コ " word shape has: the tabular rack body 16a of section, itself and the outer surface butt of the secondary battery unit 14 that is positioned at the stacked direction outer end; And a pair of lateral flanges 16b, 16b, they are side-prominent in from the edge, the left and right sides of the rack body 16a of section to stacked direction.Lateral flanges 15b, the 15b engagement of these lateral flanges 16b, 16b and adjacent intermediate support 15, thus limit whole intermediate support 15 ... and end frame 16,16 position relationship.
Return to Fig. 1 and Fig. 2, overlap a pair of end plate 17,17 on the pair of end portions support 16 of each battery module 13,16 stacked direction outer surface, by fastening this pair of end plate 17,17 of restraint zone 18, thus, 12 secondary battery units 14 ..., 11 intermediate supports 15 ... and 2 end frames 16,16 are by integrated securely.And, with respect to 2 battery modules 13,13, have 2 restraint zones 18,18.In addition, secondary battery unit 14 ..., intermediate support 15 ... and end frame 16,16 bearing surface are fixed by bonding agent.
Be fixed with the bus bar plate 19 of a plurality of buses (bus bar) that keep not shown at the upper surface of battery module 13, each secondary battery unit 14 ... terminal be electrically connected by this bus bar plate 19 each other.And 2 battery modules 13 that are set up in parallel, 13 upper surface are covered by common plastic outer cover 20.
Consist of 12 secondary battery units 14 of battery module 13 ... lower surface, be battery module 13 ... lower surface consist of the cooling surface 14a relative with the upper surface of coldplate 12 ... (with reference to Fig. 3～Fig. 6), at these cooling surfaces 14a ... and clip 1 rectangular-shaped heat transfer sheet 21 between the upper surface of coldplate 12.The material of heat transfer sheet 21 is the good synthetic resin of heat conductivity (for example, silicone rubber), is collapsed by pressure when exerting pressure and can be deformed into shape arbitrarily.In addition, the surface of heat transfer sheet 21 has stickness characteristic (cementability).
Dispose insulating trip 22 between the upper surface of the lower surface of heat transfer sheet 21 and coldplate 12.Insulating trip 22 is that the synthetic resin of PP (polypropylene) with non-conductive and water proofing property or PPS (polyphenylene sulfide) etc. is made, it constitutes the side wall portion 22b that has bottom wall part 22a and erect from bottom wall part ... shallow hypocrateriform, the bottom of the chimeric battery module 13 of section within it.Therefore, the upper surface of heat transfer sheet 21 and secondary battery unit 14 ... cooling surface 14 ... butt, the upper surface butt of the lower surface of heat transfer sheet 21 and insulating trip 22.Due to the thickness of insulating trip 22 as thin as a wafer, so hinder hardly heat transmission.
As shown in Figure 7, heat transfer sheet 21 is at secondary battery unit 14 ... stacked direction on have long limit, with the direction of its quadrature on have the rectangular-shaped sheet of minor face, its thickness is fixed along minor face, but changes along long limit.That is, large (for example, 4.1mm), the thickness T 2 at long side direction both ends is little, and (for example, 3.1mm), described heat transfer sheet 21 changes the thickness T of the long side direction central portion of heat transfer sheet 21 1 betwixt continuously.
In addition, on heat transfer sheet 21, be formed with 2 row along long side direction and add up to 22 location hole 21a ...The lower surface of the lower flange 15c of the intermediate support 15 that is clipped by adjacent a pair of secondary battery unit 14,14 is relative respectively with 2 location hole 21a, 21a.Location hole 21a is shaped as square, but its bight has fillet.The width of lower flange 15c is less than the width of location hole 21a, 21a, therefore, can pass through the both sides of the edge of location hole 21a, the visual lower flange 15c of 21a.
At the upper surface of heat transfer sheet 21, namely with secondary battery unit 14 ... cooling surface 14a ... on relative face, be formed with 11 the location notch 21b of total that extend in parallel with minor face ...In the present embodiment, overlap respectively 2 location hole 21a, 21a on each location notch 21b.Intermediate support 15 ... lower flange 15c ... from secondary battery unit 14 ... cooling surface 14a ... outstanding downwards, these lower flange 15c ... with location notch 21b ... chimeric.11 location notch 21b ... with little in the large part of the thickness of heat transfer sheet 21 (long side direction central portion) width W 1, have in the large mode of the little part of the thickness of heat transfer sheet 21 (long side direction both ends) width W 2 interimly poor.
At the upper surface of heat transfer sheet 21, along secondary battery unit 14 ... cooling surface 14a ... central portion form to add up to 12 first row air drain 21c ...Therefore, 11 location notch 21b ... with 12 first row air drain 21c ... be parallel to each other and form alternately.In addition, at the lower surface of heat transfer sheet 21, with along location notch 21b ... and first row air drain 21c ... the mode in centre position, form each 2 second row air drain 21d ..., add up to 24.On the cooling surface 14a of 1 secondary battery unit 14,2 second row air drain 21d, 21d are relative, and, second row air drain 21d ... the position misplace on long side direction, make not and location notch 21b ... position and first row air drain 21c ... the position overlap.Second row air drain 21d ... area of section be set to than first row air drain 21c ... area of section large.
At intermediate support 15 ... and end frame 16,16 lower end, spread all over all-round being formed with from secondary battery unit 14 ... cooling surface 14a ... extend downwards and spread to cooling surface 14a ... the prominent wall 15d of section that the mode of side is outstanding ..., 16c, 16c.These prominent wall 15d of section ..., 16c, 16c be formed to have slightly space α (surround the periphery of heat transfer sheet 21 with reference to Fig. 4～mode Fig. 6), it be from cooling surface 14a ... downward projecting height is set to less than the thickness of heat transfer sheet 21.
As Fig. 3 and as shown in Figure 8, at outstanding each 3 the fastener 22c that are provided with of the top edge of side wall portion 22b, the 22b corresponding with a pair of long limit of insulating trip 22 ... 2 fastener 22c, 22c in central authorities ... stop hole 22d, 22d that the length of upper formation long side direction is short, 4 fastener 22c at two ends ... form the long stop hole 22e of length of long side direction ... 22e.On the other hand, with described fastener 22c ... 3 intermediate supports 15 corresponding to position ... two sides, outstanding be provided with can with stop hole 22d, 22d, the 22e of insulating trip 22 ... the locking protrusion 15e of engaging ...
Secondly, the effect of the embodiments of the present invention with above-mentioned formation is described.
As shown in Figure 3, after completing by integrated 2 battery modules 13,13 assembling, at the secondary battery unit 14 of each battery module 13 ... cooling surface 14a ... upper to heat transfer sheet 21 location, utilize its cementability to paste cooling surface 14a ...At this moment, if mistake the position of pasting heat transfer sheet 21, the heat transfer sheet 21 of softness may be damaged owing to peelling off it, so need once just heat transfer sheet 21 is pasted correct position.
Therefore, the operator passes through the location hole 21a of heat transfer sheet 21 on one side ... visual secondary battery unit 14 ... cooling surface 14a ..., namely at the cooling surface 14a of battery module 13 ... the intermediate support 15 that exposes ... lower flange 15c ... on one side heat transfer sheet 21 is located and paste cooling surface 14a ... on (with reference to Fig. 4), make these lower flange 15c be positioned at location hole 21a ... central portion.Owing to being provided with a plurality of location hole 21a ..., and a plurality of location hole is distributed in cooling surface 14a ... integral body, so the positioning accuracy of heat transfer sheet 21 is high.At this moment, because the width of lower flange 15c is less than the width of location hole 21a, 21a, so can pass through the both sides of the edge of location hole 21a, the visual lower flange 15c of 21a, further improve thus the positioning accuracy of heat transfer sheet 21.
By Fig. 4～Fig. 6 as can be known, when pasting heat transfer sheet 21, cooling surface 14a to battery module 13 ... outstanding intermediate support 15 ... lower flange 15c ... become obstruction, but by making lower flange 15c ... be fitted to the location notch 21b in the upper surface formation of heat transfer sheet 21 ... thereby, can carry out without barrier the stickup of heat transfer sheet 21.At this moment, by chimeric location notch 21b ... and lower flange 15c ..., because heat transfer sheet 21 is physically located, so positioning accuracy further improves.In addition, due under the state of pasting heat transfer sheet 21, at the periphery of this heat transfer sheet 21 and the intermediate support 15 of battery module 13 ... and end frame 16,16 the prominent wall 15d of section ..., form space α between 16c, 16c, even so in the situation that the paste position of heat transfer sheet 21 depart from a little, heat transfer sheet 21 also not with the prominent wall 15d of section ..., 16c, 16c interfere.
In addition, due to location hole 21a ... the bight with fillet, so even just in case in the situation that the paste position of heat transfer sheet 21 departs from and again pastes, also can avoid stress to focus on location hole 21a ... thereby the situation of bight heat transfer sheet 21 breakages.
as the cooling surface 14a at battery module 13 ... during upper stickup heat transfer sheet 21, if at the upper surface of heat transfer sheet 21 and the cooling surface 14a of battery module 13 ... between have air to be enclosed, the part heat transfer sheet 21 at this air can not be fitted into cooling surface 14a ... on, thereby the possibility that exists air to become thermal insulation layer and make heat conductivity descend, but, because the upper surface at heat transfer sheet 21 is provided with a plurality of first row air drain 21c so the air that passes through to enclose is through first row air drain 21c ... be discharged to the outside, can make heat transfer sheet 21 be fitted into cooling surface 14a ... thereby raising heat conductivity.At this moment, certain location notch 21b ... also work as air discharge duct.
As described above, when pasting heat transfer sheet 21 on the cooling surface 14a at battery module 13, as Fig. 1, Fig. 3 and as shown in Figure 4, the bottom of battery module 13 is fitted on hypocraterimorphous insulating trip 22,6 fastener 22c with insulating trip 22 ... stop hole 22d, 22d, 22e ... engage to 3 intermediate supports 15 ... lateral flanges 15b ... 6 locking protrusion 15e ... thus, insulating trip 22 is by integrated and can not fall from battery module 13.Because insulating trip 22 is thin-walled and can Free Transform, so with stop hole 22d, 22d, 22e ... be engaged to locking protrusion 15e ... work become easy.
Due to stacked 12 secondary battery units 14 of battery module 13 ... and consist of, so can not avoid on business poor accumulation at intermediate support 15 ... 6 locking protrusion 15e of side ... the upper deviation that produces of interval D (with reference to Fig. 3 and Fig. 8).but, at 2 stop hole 22d with the long side direction central authorities of insulating trip 22, 22d is engaged to 2 locking protrusion 15e of the long side direction central authorities of battery module 13, after 15e, 4 stop hole 22e with the long side direction two ends of insulating trip 22 ... be engaged to 4 locking protrusion 15e at the long side direction two ends of battery module 13 at this moment, 4 stop hole 22e due to this long side direction two ends ... width be set to 4 locking protrusion 15e than correspondence ... width larger, even so at described locking protrusion 15e ... the interval on have deviation, also can successfully carry out stop hole 22d, 22d, 22e ... and locking protrusion 15e ... engaging work.
In the present embodiment, by take 2 stop hole 22d, 22d of long side direction central authorities as benchmark, insulating trip 22 being positioned, can make secondary battery unit 14 thus ... the accumulation of thickness deviation be distributed to both direction, thereby can be with 4 stop hole 22e at long side direction two ends ... with 4 corresponding locking protrusion 15e ... location dislocation be suppressed to Min..If take 2 stop hole 22e, 22e of long side direction one end as benchmark, insulating trip 22 is positioned, the location dislocation of 2 of the long side direction other end stop hole 22e, 22e and corresponding 2 locking protrusion 15e, 15e is expanded as 2 times of execution mode.
As described above, when installing insulating sheet 22 on battery module 13, as shown in Figure 1, at the upper wall portions 12a of coldplate 12 mounting battery module 13, and by connecting end plate 17 ... mounting flange 17a ... bolt 23 ... be fixed to installation base (boss) 12d of coldplate 12 ... on.Consequently, as Fig. 9 and shown in Figure 10, by apply the weight of battery module 13 on heat transfer sheet 21, heat transfer sheet 21 is compressed and press and to collapse at above-below direction, the cooling surface 14a of the upper surface of heat transfer sheet 21 and battery module 13 ... between the space and the space between the upper wall portions 12a of the lower surface of heat transfer sheet 21 and coldplate 12 disappear, 12 heat transmission is carried out efficiently from battery module 13 to coldplate, thereby the cooling performance of battery module 13 improves.
And, the bottom wall part 22a of insulating trip 22 is between the upper wall portions 12a of the lower surface of heat transfer sheet 21 and coldplate 12, but, because insulating trip 22 is synthetic resin system as thin as a wafer and can easily be out of shape, so thereby do not produce by clipping insulating trip 22 space that hinders heat to transmit.
in addition, between the upper wall portions 12a of the lower surface of heat transfer sheet 21 and coldplate 12, say exactly when having air to be enclosed between the upper surface of the lower surface of heat transfer sheet 21 and insulating trip 22, due to this air, heat transfer sheet 21 can not be fitted into the upper wall portions 12a of coldplate 12, thereby exist air to become the possibility that the thermal insulation layer heat conductivity descends, but, because the lower surface at heat transfer sheet 21 is provided with a plurality of second row air drain 21d so through second row air drain 21d ... arrive the Bas Discharged that sandwiches outside, thereby can make heat transfer sheet 21 be fitted into the upper wall portions 12a of coldplate 12 and improve heat conductivity.
When heat transfer sheet 21 compressed and press when collapsing at above-below direction, the periphery of heat transfer sheet 21 will be expanded laterally, but, due to intermediate support 15 ... and end frame 16,16 the prominent wall 15d of section ..., 16c, 16c be relative across space α in the periphery of heat transfer sheet 21, so by the prominent wall 15d of section ..., 16c, 16c stop that thereby the periphery that prevents heat transfer sheet 21 is outstanding laterally from the periphery of battery module 13.The wall 15d of section that dashed forward of expansion laterally ..., the heat transfer sheet 21 that stoped of 16c, 16c is with location hole 21a ... the mode of compression is expanded to the inside, dwindles location hole 21a ... aperture area.
Originally, in order not hinder from cooling surface 14a ... the heat transmission and with location hole 21a ... be arranged at and intermediate support 15 ... lower flange 15c ... corresponding position, but, as described above, location hole 21a ... aperture area dwindle, at intermediate support 15 ... lower flange 15c ... the cooling surface 14a that exposes of both sides ... covered by heat transfer sheet 21, thus, can will location hole 21a be set ... the decline of caused heat conductivity is suppressed to Min..
With location hole 21a ... equally, due to location notch 21b ..., first row air drain 21c ... and second row air drain 21d is also collapsed and disappears by pressure, perhaps reduced cross-sectional area is so also can will arrange location notch 21b ..., first row air drain 21c ... and second row air drain 21d ... the decline of caused heat conductivity is suppressed to Min..
In addition, although the lower surface of heat transfer sheet 21 is at the upper wall portions 12a butt of whole zone and coldplate 12, but, the intermediate support 15 of the upper surface of heat transfer sheet 21 ... lower flange 15c ... part not with cooling surface 14a ... butt is so thereby exist the area of heat transfer of upper surface than the problem of the little heat conductivity decline of area of heat transfer of lower surface.But, according to present embodiment, first row air drain 21c due to the upper surface of heat transfer sheet 21 ... pass through collapse-deformation disappears fully because area of section is little, on the contrary, the second row air drain 21d of the lower surface of heat transfer sheet 21 ... not exclusively disappear by collapse-deformation because area of section is little, the area of heat transfer of lower surface diminishes, and the amount that diminishes is only residual second row air drain 21d ... part.Consequently, thus the area of heat transfer homogenization of the area of heat transfer of the upper surface of heat transfer sheet 21 and lower surface can be prevented the decline of heat conductivity.
In addition, location notch 21b due to the upper surface of heat transfer sheet 21 ... and first row air drain 21c ... second row air drain 21d with the lower surface of heat transfer sheet 21 ... with Uncrossed mode configured in parallel when overlooking, and with the mode bias configuration that does not overlap at above-below direction, so thereby can prevent that their from intersecting or overlapping at above-below direction the thickness part that causes heat transfer sheet 21 diminishes.
In addition, when heat transfer sheet 21 is collapsed by pressure, the location notch 21b of heat transfer sheet 21 ... with intermediate support 15 ... lower flange 15c ... between the space disappear, still, also residual space herein.This be because, due to this space and lower flange 15c ... so relatively the heat conductivity of heat transfer sheet 21 is not exerted an influence, and make upper surface and the cooling surface 14a of heat transfer sheet 21 by described space ... between surface pressing increase, thereby can prevent from producing the space in this part.
But, because coldplate 12 is that the parts of the hollow of refrigerant passage 12c are arranged in internal separation, so when applying the weight of battery module 13, upper wall portions 12a is bent into downward arcuation, cooling surface 14a with respect to battery module 13 ... the long side direction both ends and the distance of upper wall portions 12a, the cooling surface 14a of battery module 13 ... the long side direction central portion and the distance of upper wall portions 12a become large.Consequently, if the even thickness of heat transfer sheet 21, the surface pressing step-down of the long side direction central portion of heat transfer sheet 21 and collapse-deformation fully, thus worry to produce the space and cause heat conductivity to descend on this part.
But, according to present embodiment, as shown in Figure 7, because the thickness that makes heat transfer sheet 21 becomes large at the long side direction central portion, diminish at long side direction both ends, so even the upper wall portions 12a of coldplate 12 is bent into downward arcuation, act on the whole zone of heat transfer sheet 21 and similarly press with long side direction both ends the long side direction central portion that collapses by making impartial surface pressing, also can prevent the generation in space and avoid the decline of heat conductivity.
In addition, when the upper wall portions 12a of coldplate 12 is bent into downward arcuation, long side direction central portion by the battery module 13 of its upper wall portions 12a supporting also will be bent into downward arcuation, but, the thickness of the long side direction central portion by increasing heat transfer sheet 21, the reaction force load that the long side direction central portion of battery module 13 is upwards elected is increased, suppress the bending of battery module 13.In addition, as shown in Figure 7, a plurality of location notch 21b due to the upper surface that is arranged at heat transfer sheet 21 ... be formed the location notch of close long side direction central portion, groove width is less, the difficult reaction force load that collapses and make progress of pressing increases so the long side direction central portion of heat transfer sheet 21 becomes, thereby can further suppress reliably the bending of battery module 13.
But, according to present embodiment, be disposed at the insulating trip 22 of below of heat transfer sheet 21 owing to having the side wall portion 22b that holds up from the periphery of bottom wall part 22a ... and form hypocrateriform, so section keeps dew and stops outflow to coldplate 12 within it, thereby can prevent reliably the generation of ground connection.In addition, because the material of insulating trip 22 by water proofing property consists of, become independently drops so be attached to its surperficial dew, thereby can prevent effectively further that battery module 13 and coldplate 12 from conducting.
Above, embodiments of the present invention have been described, still, the present invention can carry out various design alterations in the scope that does not break away from its purport.
For example, heat transfer sheet 21 is not limited to has cementability, also can not have cementability.Even in the situation that heat transfer sheet 21 does not have cementability, by location hole 21a is set, also can easily and reliably position.
In addition, can consist of heat transfer sheet 21 by the material with absorptive Porous.In the case, can further prevent reliably the generation of ground connection.
In addition, the shape of location hole 21a is not limited to execution mode, as shown in the second～the 4th execution mode in Figure 11, can adopt various shapes.In either event, location hole 21a preferably has fillet in the bight so that stress is not concentrated.
In addition, make location hole 21a relative with the lower flange 15c of intermediate support 15 in execution mode, still, as long as location hole 21a is relative just passable with the mark arbitrarily position of the lower surface of battery module 13.
In addition, to be not limited to air can be also water to the kind of cold-producing medium.
Claims (5)
1. the cooling construction of a storage battery, its heat transfer sheet (21) that clamping can be out of shape under pressure between the cooling surface (14a) of the battery module (13) of stacked a plurality of secondary battery units (14) and coldplate (12), through described heat transfer sheet (21), the heat of described battery module (13) is passed to described coldplate (12) from described cooling surface (14a), thereby carry out cooling, it is characterized in that
Described heat transfer sheet (21) has the location hole (21a) of cooling surface (14a) that can visual described battery module (13).
2. the cooling construction of storage battery as claimed in claim 1, is characterized in that,
Described battery module (13) has the support (15) that is clipped in the middle by described a plurality of secondary battery units (14), and described support (15) is relative with described location hole (21a).
3. as the cooling construction of claim 1 or 2 described storage batterys, it is characterized in that,
The number of described location hole (21a) is a plurality of.
4. as the cooling construction of the described storage battery of any one in claim 1～3, it is characterized in that,
Described battery module (13) have surround described cooling surface (14a) around and to the side-prominent prominent wall section (15d, 16c) of described coldplate (12).
5. as the cooling construction of the described storage battery of any one in claim 1～4, it is characterized in that,
Described support (15) has the location division (15c) narrower than the width of described location hole (21a), is provided with a plurality of described location holes (21a) along described location division (15c).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011269834A JP5580282B2 (en) | 2011-12-09 | 2011-12-09 | Battery cooling system |
| JP2011-269834 | 2011-12-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103165954A true CN103165954A (en) | 2013-06-19 |
| CN103165954B CN103165954B (en) | 2015-09-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210390813.7A Active CN103165954B (en) | 2011-12-09 | 2012-10-15 | The cooling construction of storage battery |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US9163887B2 (en) |
| JP (1) | JP5580282B2 (en) |
| CN (1) | CN103165954B (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN103165954B (en) | 2015-09-23 |
| US20130146249A1 (en) | 2013-06-13 |
| JP5580282B2 (en) | 2014-08-27 |
| US9163887B2 (en) | 2015-10-20 |
| JP2013122817A (en) | 2013-06-20 |
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